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POMy Android app won't start
 

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  1. POMy Android app won't start
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    <p>I tried to make an Android app that would send a text to the server using asynctask. I successfully ran and tested one button, and now I'm having trouble with five buttons and five textviews.</p> <p>My activity_main layout:</p> <pre><code>&lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@drawable/bckgrnd_2" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".MainActivity" &gt; &lt;Button android:id="@+id/button1" android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center" android:text="@string/btn1" android:onClick="buttonClicked1" /&gt; &lt;Button android:id="@+id/button2" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_alignRight="@+id/button1" android:layout_below="@+id/button1" android:onClick="buttonClicked2" android:text="@string/btn2" /&gt; &lt;Button android:id="@+id/button3" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_alignRight="@+id/button2" android:layout_below="@+id/button2" android:text="@string/btn3" android:onClick="buttonClicked3" /&gt; &lt;Button android:id="@+id/button4" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_alignLeft="@+id/button3" android:layout_below="@+id/button3" android:text="@string/btn4" android:onClick="buttonClicked4" /&gt; &lt;Button android:id="@+id/button5" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_alignRight="@+id/button4" android:layout_below="@+id/button4" android:onClick="buttonClicked5" android:text="@string/btn5" /&gt; &lt;EditText android:id="@+id/editText1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/button5" android:text="play1" /&gt; &lt;TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignRight="@+id/editText1" android:layout_below="@+id/editText2" android:text="play2" /&gt; &lt;TextView android:id="@+id/textView2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignRight="@+id/textView1" android:layout_below="@+id/editText3" android:text="play3" /&gt; &lt;TextView android:id="@+id/textView3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/textView2" android:layout_below="@+id/editText4" android:text="play4" /&gt; &lt;TextView android:id="@+id/textView4" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/textView3" android:layout_below="@+id/editText5" android:text="play5" /&gt; &lt;/RelativeLayout&gt; </code></pre> <p>My main activity code:</p> <pre><code>public class MainActivity extends Activity { private EditText textField; private EditText textField1; private EditText textField2; private EditText textField3; private EditText textField4; private Button button1; private Button button2; private Button button3; private Button button4; private Button button5; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); textField = (EditText) findViewById(R.id.editText1); textField1 = (EditText) findViewById(R.id.editText2); textField2 = (EditText) findViewById(R.id.editText3); textField3 = (EditText) findViewById(R.id.editText4); textField4 = (EditText) findViewById(R.id.editText5); button1 = (Button) findViewById(R.id.button1); button2 = (Button) findViewById(R.id.button2); button3 = (Button) findViewById(R.id.button3); button4 = (Button) findViewById(R.id.button4); button5 = (Button) findViewById(R.id.button5); textField.setVisibility(View.GONE); textField1.setVisibility(View.GONE); textField2.setVisibility(View.GONE); textField3.setVisibility(View.GONE); textField4.setVisibility(View.GONE); } public void buttonClicked1(View v){ Toast.makeText(this, "Song Has Been Successfully Added!", Toast.LENGTH_SHORT).show(); new asynctask().execute(textField); } public void buttonClicked2(View v) { Toast.makeText(this, "Song Has Been Successfully Added!", Toast.LENGTH_SHORT).show(); new asynctask().execute(textField1); } public void buttonClicked3(View v) { Toast.makeText(this, "Song Has Been Successfully Added!", Toast.LENGTH_SHORT).show(); new asynctask().execute(textField2); } public void buttonClicked4(View v) { Toast.makeText(this, "Song Has Been Successfully Added!", Toast.LENGTH_SHORT).show(); new asynctask().execute(textField3); } public void buttonClicked5(View v) { Toast.makeText(this, "Song Has Been Successfully Added!", Toast.LENGTH_SHORT).show(); new asynctask().execute(textField4); } } </code></pre> <p>Asynctask code:</p> <pre><code>public class asynctask extends AsyncTask&lt;View, Integer, Socket&gt; { private static final String IP_ADDRESS = "192.168.1.106"; private static final int DEST_PORT = 7777; private EditText mTextField; protected Socket doInBackground(View... params) { if (params.length != 1) throw new IllegalArgumentException(); mTextField = (EditText) params[0]; Socket client = null; try { client = new Socket(IP_ADDRESS, DEST_PORT); } catch (UnknownHostException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return client; } protected void onPostExecute(Socket client) { try { PrintWriter printwriter; String messsage; messsage = mTextField.getText().toString(); mTextField.setText(""); printwriter = new PrintWriter(client.getOutputStream(), true); printwriter.write(messsage); printwriter.flush(); printwriter.close(); client.close(); } catch (IOException e) { e.printStackTrace(); } } } </code></pre> <p>This is what my logcat says:</p> <pre><code>09-12 01:28:30.914: E/AndroidRuntime(560): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 09-12 01:28:30.914: E/AndroidRuntime(560): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 09-12 01:28:30.914: E/AndroidRuntime(560): at dalvik.system.NativeStart.main(Native Method) 09-12 01:28:30.914: E/AndroidRuntime(560): Caused by: java.lang.NullPointerException 09-12 01:28:30.914: E/AndroidRuntime(560): at com.timskie.dancingfountainv1.MainActivity.onCreate(MainActivity.java:46) 09-12 01:28:30.914: E/AndroidRuntime(560): at android.app.Activity.performCreate(Activity.java:4465) 09-12 01:28:30.914: E/AndroidRuntime(560): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 09-12 01:28:30.914: E/AndroidRuntime(560): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1919) 09-12 01:28:30.914: E/AndroidRuntime(560): ... 11 more </code></pre>
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    1. USPeter Mortensen
    1. USTim
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    1. COpost the stack trace pls
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      1. USRaghunandan
    2. COI always get the msg when i run it "Unfortunately App has stopped working"
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    3. COPost Your stack trace.
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      1. USDJhon
 

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